RU189661U1 - Electromagnetic circuit breaker release - Google Patents

Abstract

The invention relates to low-voltage equipment and can be used to create circuit breakers designed to protect against overloads. The required technical result, which consists in improving reliability and accuracy while reducing time and simplifying setup, is achieved in a device comprising a case in which an electromagnet magnetizing winding is placed, the armature of which is designed to act on the emergency-off rail of the automatic switch, as well as the compression spring and a node for adjusting the compression force of the spring, which is made in the form of a permanent magnet fixed in the lower part inside the housing, while the spring with zhatiya installed along the side surface of the armature, provided with an upper side protrusion to hold the compression spring on the side surface of the armature, which is made with a protrusion in the hole in the upper wall of the housing to be able to affect the circuit breaker emergency shutdown. 1 il.

Description

The invention relates to low-voltage equipment and can be used to create circuit breakers designed to protect against overloads.

An electromagnetic release for a circuit breaker [RU 143907, U1, H01H 73/36, 08/10/2014] is known, which contains an anchor, a magnetizing winding, a metal core, a compression spring and a magnetic core, and the anchor is made in the shape of a curved plate with a back rest fixed to magnetic conductor by means of a compression spring hooked over the hole in the magnetic conductor and positioned on it by means of installation in the opening formed by the technological protrusions of the magnetic conductor, while the armature contains stops in contact with the protrusions of the magnet Provision.

A disadvantage of the known solution is the impossibility of adjusting the opposing force of the return spring, which is selected empirically in the manufacturing process of the release.

The closest in technical essence to the present invention is an electromagnetic short circuit current release circuit breaker [EN 157514, U1, H01H 73/36, 10.12.2015], containing a magnetic core, an electromagnet magnetizing coil placed on the coil, and capable of influencing an emergency shutdown rail an anchor, as well as a spring compression adjustment unit located in its upper part, which consists of a cylindrical guide which is integral with the electromagnet coil and is mounted on therewith and made to counteract the movement of the armature of the compression spring, made with the possibility of changing the force of the spring of the adjusting nut and the disc washer from the guide, moreover, the magnetic circuit is made of soft magnetic material, the coil of the electromagnet is made of electrical plastic, and the anchor is made with its upper parts carved.

The disadvantage of the closest technical solution is its relatively low reliability, caused by the use of an adjusting nut and a disc washer, which do not allow to maintain the specified settings accurately, to ensure high reliability and accuracy of work and the use of which complicates and slows down the setting of the device, especially in the manufacture of small batches of products with different maximum values of setting currents.

The problem, which is solved in the utility model, is to create an electromagnetic release with higher reliability and accuracy, as well as simplifying and reducing setup time.

The required technical result of the utility model is to increase the reliability and accuracy of work while reducing time and simplifying the settings.

The problem is solved, and the required technical result is achieved by the fact that the electromagnetic release of the circuit breaker contains a case in which the magnetizing winding of the electromagnet is placed, the armature of which is designed to affect the emergency shutdown rail of the circuit breaker and the compression spring and force adjustment unit spring compression, according to the utility model, the spring compression force adjustment unit is made in the form of a permanent magnet fixed in the bottom part Three bodies, a compression spring is installed along the side surface of the armature, provided with an upper side protrusion to hold the compression spring on the side surface of the armature, which is made with a protrusion in the hole in the upper wall of the body to allow the circuit breaker to have an emergency shutdown switch.

In addition, the required technical result is achieved by the fact that the upper surface of the permanent magnet is provided with a damping element to reduce the mechanical effect of the armature on the permanent magnet.

The drawing shows in section the functional diagram of the electromagnetic release of the circuit breaker, where:

1 - case;

2 - electromagnet winding;

3 - anchor of the electromagnet;

4 - compression spring;

5 - unit for adjusting the spring compression force (permanent magnet);

6 - upper side protrusion to hold the compression spring;

7 - damping element.

Electromagnetic release of the circuit breaker includes a housing 1 in which the magnetizing winding 2 of the electromagnet is placed, the anchor 3 of which is designed to affect the circuit breaker rail of the circuit breaker (not shown).

In addition, the electromagnetic release of the circuit breaker contains a spring 4 compression and node 5 adjusting the compression force of the spring, which is made in the form of a permanent magnet mounted in the lower part inside the housing 1.

In the electromagnetic release of the automatic switch, the compression spring 4 is installed along the side surface of the armature 3, provided with an upper side protrusion 6 for holding the compression spring 4 on the side surface of the armature 3, which is made with a protrusion in the hole in the upper wall of the housing 1 to enable the emergency-off rail to automatically act switch. To reduce the mechanical effect of the armature 3 on the permanent magnet 5, the upper surface of the permanent magnet 5 can be provided with a damping element 7 to reduce the mechanical effect of the armature 3 on the permanent magnet 5.

The electromagnetic release of the circuit breaker is used as follows.

During the flow through the winding 2 of the electromagnet 2 current, the value of which is equal to or less than the current setpoint, the armature 3 of the electromagnet is held by a permanent magnet 5 that acts as a node for adjusting the compression force of the compression spring 4, which is in the compressed position.

In the presence of a current exceeding the setpoint, the anchor 3 is pushed upward under the action of the compression spring 4 and, thus, it is possible to affect the emergency-off rail of the automatic switch.

To reduce the mechanical effect of the armature 3 on the permanent magnet 5, its upper surface can be provided with a damping element 7 to reduce the mechanical effect of the armature 3 on the permanent magnet 5.

If it is necessary to reconfigure to another setting, it is enough to replace the permanent magnet 5 with a magnet with a different value, which simplifies and speeds up the setup of the device. And since such a node is not affected by the change in its installed setting, it provides high reliability and accuracy of the device. This achieves the required technical result.

Claims (2)

1. Electromagnetic release of the circuit breaker, comprising a case in which the magnetizing winding of the electromagnet is placed, the armature of which is designed to affect the emergency shutdown rail of the circuit breaker, as well as the compression spring and the spring compression force adjustment unit made in the form of a permanent magnet fixed in the lower part inside the case, the compression spring is installed along the side surface of the armature, provided with m lateral protrusion for retaining the compression spring on the side surface of the armature, which is arranged with a ledge in the hole in the upper wall of the housing for the possible impact on the rail emergency shutdown circuit breaker. 2. Electromagnetic release of the circuit breaker according to claim 1, characterized in that the upper surface of the permanent magnet is provided with a damping element to reduce the mechanical effect of the armature on the permanent magnet.

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